Cutter arm for mining machines



Aug. 11, 1925. 1,549,654

J. W. DILLON CUTTER ARM FOR MINING MACHINES Filed Sept. 27, 1924 j mun (9 (f (4 I? i 2 5mm;

Patented Aug. 11, 1925.

UNITED STATES JOHN W. DILLON, OF MASONTOWN, PENNSYLVANIA.

CUTTER ARM FOR MINING MACHINES.

Application filed September 27, 1924. Serial No. 740,372.

T all whom it may concern:

Be it known that I, JOHN W. DILLON, a citizen of the United States, residing at Masontown, in the county of Fayette and State of Pennsylvania, have invented certain new and useful Improvements in Cutter Arms for Mining Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in cutter arms for mining machines and has relation more particularly to a de vice of this general character constituting a runway or guide for the cutter or bit chain and it is an object of the invention to pro vide a device of this general character hav ing novel and improved means whereby ready access may be had to the chain for the purposes of inspection and repair without the necessity of disassembling the arm or any part of the machine.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved cutter arm for mining machines whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a fragmentary view in plan and of a diagrammatic character illustrating a cutter arm constructed in accordance with an embodiment of my invention;

Figure 2 is a view in bottom plan of the upper section of a gib or member of the spective of the upper section comprised in the gib or member of the arm;

Figure 6 is a fragmentary view in perspective of the lower section comprised in the gib or member;

Figure 7 is a sectional view taken substantially on the line 7 7 of Figure 4;

Figure 8 is a view in perspective taken substantially on the line 88 of Figure 4.

As disclosed in the accompanying drawings, A denotes a cutter arm for a mining machine of a type wherein the cutting lugs 1 are carried by a chain 2 as is well-known.

Each of the members or gibs M as comprised in the arm consists of a pair of superimposed elongated sections 8 and 4 adapted to be riveted or otherwise held in assembled relation to provide a'track or guide way 5 for the chain 2 and the open slot through which the bits or cutters 1 project.

At a predetermined point'intermediate its end the horizontal flange 6 of the bottom section 4 is cut away, as at 7, with the p0rtions of the flange 6 constituting the ends of said cut away portion 7 being beveled, as at 8, so that the chain 2 and the cutter lugs 1 may readily pass along the gib or member without undue hindrance or obstruction being offered by said ends of the cut out portion 7.

The horizontal flange 9 of the upper section is also provided with the cut out portion 10, said out out portion 10 being of a length considerably greater than the length of the cut out portion 7, with the extremities of the flange 9 constituting the ends of said out out portion 10 being also beveled, as at 11, to assure the unhindered or unobstructed travel of the chain 2 and the bits or cutters 2.

Similar ends of the cut out portions 7 and 10 are coincident while the opposite end of the cut out portion 10 terminates inwardly of the adjacent end of the cut out portion 7 whereby the bottom flange 6 underlying said extended part of the cut away portion 10 provides a shelf or abutment 12. The cut away portions 7 or 10 readily permit the removal of a link of the chain 2 or a cutter lug 1 and also provide means whereby the chain and the cutters or bits carried thereby may be readily inspected. When a link of the chain or a cutter or bit is removed the same may be readily replaced without the necessity of disassembling the arm A and the shelf or abutment 12 provides space on which a new link or cutter or bit may rest to permit the same to be riveted in working position and thereby avoid the necessity of the operator requiring an assistant to brace up such work with a hammer or kindred tool as is now generally done.

From the foregoing description it is thought to be obvious that a cutter arm for mining machines constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim 1. A cutter arm for a mining machine comprising a gib consisting of two superimposed sections having arun-way for the chain and an open slot for the cutter lug, the flanges of the sections defining the open slot having cut away portions, one of said cut away portions extending beyond an end of the second cut away portion.

2. A cutter arm for a mining machine comprising a gib consisting of two superimposed sections having a run-way for the chain and an open slot for the cutter lug, the flanges of the sections defining the open slot having cut away portions, one of said cut away portions extending beyond an end of the second cut away portion, the end walls of said cut away portions being beveled.

3. A cutter arm for a mining machine comprising a gib consisting of two superimposed sections having a run-way for the chain and an open slot for the cutter lug, the flanges of the sections defining the open slot having cut away portions, one of said cut away portions extending beyond an end of the second cut away portion, the opposite ends of said cut away portions being substantially coincident.

In testimony whereof I hereunto affix my signature.

JOHN W. DILLON. 

